#ifndef _DES_H_
#define _DES_H_

void des_encrypt_data(unsigned char * plaintext,unsigned int plaintext_len,
	unsigned char * ciphertext,unsigned int * ciphertext_len,
	unsigned char * key,unsigned char key_len);
void des_decrypt_data(unsigned char *ciphertext, unsigned int ciphertext_len,
		unsigned char *plaintext,unsigned int *plaintext_len,		 
		unsigned char *key, unsigned char key_len);

#endif
